CPL Aircraft General Knowledge · Practice

What does 'hunting' in a constant-speed unit (CSU) governor mean?

• A.The governor automatically searching for the nearest suitable aerodrome and computing a descent profile after detecting an engine anomaly
• B.Oscillation of the propeller RPM above and below the set point — indicating governor instability, often due to a worn pilot valve or incorrect oil viscosity
• C.The pilot repeatedly adjusting the RPM control lever back and forth to find the optimum power setting for the current cruise altitude
• D.The propeller blades oscillating rapidly between fine and coarse pitch limits during the take-off roll as the governor struggles to control RPM